
html, body, ul, li, ol, dl, dd, dt, p, h1, h2, h3, h4, h5, h6, form, fieldset, legend, img,input{ margin:0; padding:0; }
fieldset, img,input,button { border:0 none; padding:0;margin:0;outline-style:none; }   /*去掉input等聚焦时的蓝色边框*/
ul,li,ol{ list-style:none; }
html,body{height: 100%;}

select, input { vertical-align:middle;}
/*select, input, textarea { font-size:12px; margin:0; }*/
textarea { resize:none; } /*防止拖动*/
img {border:0; vertical-align:middle; }  


a {text-decoration:none;color:#000; }



h1,h2,h3,h4,h5,h6 {font-weight:normal;font-size:1em;}  /*设置h标签的大小，设置跟父亲一样大的字体font-size:100%;*/
s,i,em{font-style:normal;text-decoration:none;}

/* 只要元素需要左浮动就给元素添加一个class名为fl */
.fl {
    float:left;
}
/*只要元素需要右浮动就给元素添加一个class名为fr  */
.fr {
    float:right;
}
.ac {
    text-align:center;
}
.f12{ font-size: 12px;}
.f14{ font-size: 14px;}
.f16{ font-size: 16px;}
.df{display: flex;}
.fdc{flex-direction: column;}
.jc{justify-content: center;}
.ai{align-items: center;}
.bs{box-sizing: border-box;}
.jcs{justify-content: space-between;}